McNary Dam Threshold Days by Year (USC00455231)
16 fixed thresholds counted per year at McNary Dam (USC00455231): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for McNary Dam Thresholds
- McNary Dam: nights with a minimum temperature at or below 0 C (32 F) in 51 years, most in 1985 with 121.
- McNary Dam: days with a maximum temperature at or above 30 C (86 F) in 49 years, most in 1967 with 83.
- McNary Dam: days with a maximum temperature at or above 35 C (95 F) in 49 years, most in 1958 with 46.
- McNary Dam: days with a maximum temperature at or above 90 F (32.2 C) in 49 years, most in 1958 with 67.
- 16 fixed thresholds have at least one qualifying day at McNary Dam.
Days at or above 30 C (86 F)
49 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1955 | 55 | 61.6 |
| 1956 | 64 | 61.6 |
| 1957 | 60 | 61.6 |
| 1958 | 81 | 61.6 |
| 1959 | 48 | 61.6 |
| 1960 | 67 | 59.7 |
| 1961 | 73 | 59.7 |
| 1962 | 53 | 59.7 |
| 1963 | 59 | 59.7 |
| 1964 | 38 | 59.7 |
| 1965 | 48 | 59.7 |
| 1966 | 60 | 59.7 |
| 1967 | 83 | 59.7 |
| 1968 | 51 | 59.7 |
| 1969 | 65 | 59.7 |
| 1970 | 60 | 52.4 |
| 1971 | 57 | 52.4 |
| 1972 | 62 | 52.4 |
| 1973 | 59 | 52.4 |
| 1974 | 54 | 52.4 |
| 1975 | 34 | 52.4 |
| 1976 | 40 | 52.4 |
| 1977 | 55 | 52.4 |
| 1978 | 43 | 52.4 |
| 1979 | 60 | 52.4 |
| 1980 | 34 | 55.5 |
| 1983 | 48 | 55.5 |
| 1984 | 56 | 55.5 |
| 1985 | 62 | 55.5 |
| 1986 | 68 | 55.5 |
| 1987 | 76 | 55.5 |
| 1988 | 60 | 55.5 |
| 1989 | 40 | 55.5 |
| 1990 | 58 | 50 |
| 1991 | 50 | 50 |
| 1992 | 55 | 50 |
| 1993 | 33 | 50 |
| 1994 | 61 | 50 |
| 1995 | 44 | 50 |
| 1996 | 41 | 50 |
| 1997 | 49 | 50 |
| 1998 | 67 | 50 |
| 1999 | 42 | 50 |
| 2000 | 47 | 55.2 |
| 2001 | 60 | 55.2 |
| 2002 | 56 | 55.2 |
| 2003 | 66 | 55.2 |
| 2004 | 59 | 55.2 |
| 2006 | 43 | 55.2 |
| Year | First date | Last date |
|---|---|---|
| 1955 | 1955-05-20 | 1955-09-11 |
| 1956 | 1956-05-16 | 1956-09-26 |
| 1957 | 1957-04-29 | 1957-09-25 |
| 1958 | 1958-05-16 | 1958-10-04 |
| 1959 | 1959-05-13 | 1959-09-13 |
| 1960 | 1960-05-10 | 1960-09-19 |
| 1961 | 1961-05-19 | 1961-09-09 |
| 1962 | 1962-06-09 | 1962-09-27 |
| 1963 | 1963-05-19 | 1963-09-30 |
| 1964 | 1964-06-01 | 1964-09-25 |
| 1965 | 1965-05-29 | 1965-09-02 |
| 1966 | 1966-05-04 | 1966-09-23 |
| 1967 | 1967-05-17 | 1967-09-22 |
| 1968 | 1968-04-30 | 1968-09-12 |
| 1969 | 1969-05-10 | 1969-09-13 |
| 1970 | 1970-05-17 | 1970-09-01 |
| 1971 | 1971-05-03 | 1971-09-06 |
| 1972 | 1972-05-14 | 1972-09-17 |
| 1973 | 1973-05-14 | 1973-09-13 |
| 1974 | 1974-06-11 | 1974-09-19 |
| 1975 | 1975-06-02 | 1975-09-16 |
| 1976 | 1976-05-09 | 1976-10-01 |
| 1977 | 1977-04-24 | 1977-09-05 |
| 1978 | 1978-06-06 | 1978-09-04 |
| 1979 | 1979-05-22 | 1979-09-21 |
| 1980 | 1980-05-05 | 1980-10-06 |
| 1983 | 1983-05-24 | 1983-09-07 |
| 1984 | 1984-06-15 | 1984-09-18 |
| 1985 | 1985-05-17 | 1985-09-04 |
| 1986 | 1986-04-22 | 1986-09-07 |
| 1987 | 1987-04-29 | 1987-09-21 |
| 1988 | 1988-05-13 | 1988-10-02 |
| 1989 | 1989-06-02 | 1989-09-25 |
| 1990 | 1990-06-20 | 1990-09-26 |
| 1991 | 1991-07-02 | 1991-10-02 |
| 1992 | 1992-05-08 | 1992-09-12 |
| 1993 | 1993-05-12 | 1993-09-11 |
| 1994 | 1994-05-07 | 1994-09-27 |
| 1995 | 1995-05-29 | 1995-09-20 |
| 1996 | 1996-06-08 | 1996-09-30 |
| 1997 | 1997-05-13 | 1997-09-26 |
| 1998 | 1998-05-01 | 1998-09-17 |
| 1999 | 1999-05-25 | 1999-09-23 |
| 2000 | 2000-05-17 | 2000-09-19 |
| 2001 | 2001-05-13 | 2001-09-25 |
| 2002 | 2002-06-13 | 2002-09-14 |
| 2003 | 2003-05-24 | 2003-09-27 |
| 2004 | 2004-06-04 | 2004-09-01 |
| 2006 | 2006-05-16 | 2006-09-13 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 49 | 83 | 1967 | 43 |
| 35 C (95 F): Days | 49 | 46 | 1958 | 14 |
| 40 C (104 F): Days | 24 | 8 | 1958 | 1 |
| 90 F (32.2 C): Days | 49 | 67 | 1958 | 30 |
| 100 F (37.8 C): Days | 42 | 23 | 1958 | 3 |
| 110 F (43.3 C): Days | 2 | 1 | 1960 | 1 |
| 0 C (32 F): Ice days (max | 47 | 56 | 1985 | 7 |
| 0 C (32 F): Frost days (min | 51 | 121 | 1985 | 62 |
| -10 C (14 F): Days with min | 34 | 22 | 1972 | 2 |
| -20 C (-4 F): Days with min | 8 | 5 | 1996 | 5 |
| 20 C (68 F): Tropical nights (min | 46 | 24 | 1958 | 7 |
| 25 C (77 F): Days with min | 1 | 1 | 1961 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 46 | 8 | 1983 | 3 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 6 | 1 | 1957 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 1 | 1 | 1957 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 5 | 2 | 1993 | 2 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1955.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2025-12-31).